installed dokuwiki, added to navbar, updated news

1 files changed, 186 insertions, 0 deletions

diff --git a/wiki/inc/fetch.functions.php b/wiki/inc/fetch.functions.php
new file mode 100644
index 0000000..b8e75ea
--- /dev/null
+++ b/wiki/inc/fetch.functions.php
@@ -0,0 +1,186 @@
+<?php
+/**
+ * Functions used by lib/exe/fetch.php
+ * (not included by other parts of dokuwiki)
+ */
+
+/**
+ * Set headers and send the file to the client
+ *
+ * The $cache parameter influences how long files may be kept in caches, the $public parameter
+ * influences if this caching may happen in public proxis or in the browser cache only FS#2734
+ *
+ * This function will abort the current script when a 304 is sent or file sending is handled
+ * through x-sendfile
+ *
+ * @author Andreas Gohr <andi@splitbrain.org>
+ * @author Ben Coburn <btcoburn@silicodon.net>
+ * @author Gerry Weissbach <dokuwiki@gammaproduction.de>
+ *
+ * @param string $file   local file to send
+ * @param string $mime   mime type of the file
+ * @param bool   $dl     set to true to force a browser download
+ * @param int    $cache  remaining cache time in seconds (-1 for $conf['cache'], 0 for no-cache)
+ * @param bool   $public is this a public ressource or a private one?
+ * @param string $orig   original file to send - the file name will be used for the Content-Disposition
+ */
+function sendFile($file, $mime, $dl, $cache, $public = false, $orig = null) {
+    global $conf;
+    // send mime headers
+    header("Content-Type: $mime");
+
+    // calculate cache times
+    if($cache == -1) {
+        $maxage  = max($conf['cachetime'], 3600); // cachetime or one hour
+        $expires = time() + $maxage;
+    } else if($cache > 0) {
+        $maxage  = $cache; // given time
+        $expires = time() + $maxage;
+    } else { // $cache == 0
+        $maxage  = 0;
+        $expires = 0; // 1970-01-01
+    }
+
+    // smart http caching headers
+    if($maxage) {
+        if($public) {
+            // cache publically
+            header('Expires: '.gmdate("D, d M Y H:i:s", $expires).' GMT');
+            header('Cache-Control: public, proxy-revalidate, no-transform, max-age='.$maxage);
+        } else {
+            // cache in browser
+            header('Expires: '.gmdate("D, d M Y H:i:s", $expires).' GMT');
+            header('Cache-Control: private, no-transform, max-age='.$maxage);
+        }
+    } else {
+        // no cache at all
+        header('Expires: Thu, 01 Jan 1970 00:00:00 GMT');
+        header('Cache-Control: no-cache, no-transform');
+    }
+
+    //send important headers first, script stops here if '304 Not Modified' response
+    $fmtime = @filemtime($file);
+    http_conditionalRequest($fmtime);
+
+    // Use the current $file if is $orig is not set.
+    if ( $orig == null ) {
+        $orig = $file;
+    }
+
+    //download or display?
+    if($dl) {
+        header('Content-Disposition: attachment;'.rfc2231_encode('filename', utf8_basename($orig)).';');
+    } else {
+        header('Content-Disposition: inline;'.rfc2231_encode('filename', utf8_basename($orig)).';');
+    }
+
+    //use x-sendfile header to pass the delivery to compatible webservers
+    http_sendfile($file);
+
+    // send file contents
+    $fp = @fopen($file, "rb");
+    if($fp) {
+        http_rangeRequest($fp, filesize($file), $mime);
+    } else {
+        http_status(500);
+        print "Could not read $file - bad permissions?";
+    }
+}
+
+/**
+ * Try an rfc2231 compatible encoding. This ensures correct
+ * interpretation of filenames outside of the ASCII set.
+ * This seems to be needed for file names with e.g. umlauts that
+ * would otherwise decode wrongly in IE.
+ *
+ * There is no additional checking, just the encoding and setting the key=value for usage in headers
+ *
+ * @author Gerry Weissbach <gerry.w@gammaproduction.de>
+ * @param string $name      name of the field to be set in the header() call
+ * @param string $value     value of the field to be set in the header() call
+ * @param string $charset   used charset for the encoding of value
+ * @param string $lang      language used.
+ * @return string           in the format " name=value" for values WITHOUT special characters
+ * @return string           in the format " name*=charset'lang'value" for values WITH special characters
+ */
+function rfc2231_encode($name, $value, $charset='utf-8', $lang='en') {
+    $internal = preg_replace_callback('/[\x00-\x20*\'%()<>@,;:\\\\"\/[\]?=\x80-\xFF]/', function($match) { return rawurlencode($match[0]); }, $value);
+    if ( $value != $internal ) {
+        return ' '.$name.'*='.$charset."'".$lang."'".$internal;
+    } else {
+        return ' '.$name.'="'.$value.'"';
+    }
+}
+
+/**
+ * Check for media for preconditions and return correct status code
+ *
+ * READ: MEDIA, MIME, EXT, CACHE
+ * WRITE: MEDIA, FILE, array( STATUS, STATUSMESSAGE )
+ *
+ * @author Gerry Weissbach <gerry.w@gammaproduction.de>
+ *
+ * @param string $media  reference to the media id
+ * @param string $file   reference to the file variable
+ * @param string $rev
+ * @param int    $width
+ * @param int    $height
+ * @return array as array(STATUS, STATUSMESSAGE)
+ */
+function checkFileStatus(&$media, &$file, $rev = '', $width=0, $height=0) {
+    global $MIME, $EXT, $CACHE, $INPUT;
+
+    //media to local file
+    if(media_isexternal($media)) {
+        //check token for external image and additional for resized and cached images
+        if(media_get_token($media, $width, $height) !== $INPUT->str('tok')) {
+            return array(412, 'Precondition Failed');
+        }
+        //handle external images
+        if(strncmp($MIME, 'image/', 6) == 0) $file = media_get_from_URL($media, $EXT, $CACHE);
+        if(!$file) {
+            //download failed - redirect to original URL
+            return array(302, $media);
+        }
+    } else {
+        $media = cleanID($media);
+        if(empty($media)) {
+            return array(400, 'Bad request');
+        }
+        // check token for resized images
+        if (($width || $height) && media_get_token($media, $width, $height) !== $INPUT->str('tok')) {
+            return array(412, 'Precondition Failed');
+        }
+
+        //check permissions (namespace only)
+        if(auth_quickaclcheck(getNS($media).':X') < AUTH_READ) {
+            return array(403, 'Forbidden');
+        }
+        $file = mediaFN($media, $rev);
+    }
+
+    //check file existance
+    if(!file_exists($file)) {
+        return array(404, 'Not Found');
+    }
+
+    return array(200, null);
+}
+
+/**
+ * Returns the wanted cachetime in seconds
+ *
+ * Resolves named constants
+ *
+ * @author  Andreas Gohr <andi@splitbrain.org>
+ *
+ * @param string $cache
+ * @return int cachetime in seconds
+ */
+function calc_cache($cache) {
+    global $conf;
+
+    if(strtolower($cache) == 'nocache') return 0; //never cache
+    if(strtolower($cache) == 'recache') return $conf['cachetime']; //use standard cache
+    return -1; //cache endless
+}